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Author Topic: WTB 500 transmission  (Read 742 times)

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WTB 500 transmission
« on: September 19, 2013, 08:12:21 am »
I need a transmission.  My 500 keeps popping out of second gear and I don't want to split the cases, I will if I have too though.  I would prefer to get a bottom end that I can bolt my cylinder too.  A rebuilt tranny is even better.  Anyone have anything?

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Re: WTB 500 transmission
« Reply #1 on: September 19, 2013, 11:37:52 am »
How much you looking to spend Moto? Text me that amount and I'll keep my eyes out for you.

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Re: WTB 500 transmission
« Reply #2 on: September 19, 2013, 02:42:58 pm »
My 87 zilla sometimes pops out of second gear also, especially when trying to downshift from 3rd it will often go straight to neutral. Can be very frustrating! I've been hesitant to tear into the bottom end, as well, not wanting to have issues like air leaks or something after putting everything back together.

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Re: WTB 500 transmission
« Reply #3 on: September 19, 2013, 04:53:08 pm »
If they are jumping out of gear you are probably going to need to replace at least two gears and possibly a shift fork. 

DO NOT KEEP PRESSURE AGAINST THE SHIFT LEVER WITH YOUR FOOT IN ATTEMPT TO HOLD IT IN GEAR. 

Trying to hold it in gear burns the tip s of the shift forks. 

I hate to say it but you need to park it or fix it before something breaks.....then it will be real expensive.

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Re: WTB 500 transmission
« Reply #4 on: September 19, 2013, 05:14:27 pm »
It's parked and the motor is off he's just a **** and doesn't want to split his cases. I keep telling him lets just do it but he won't sack up and just wants to buy a good condition working bottom end.

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Re: WTB 500 transmission
« Reply #5 on: September 19, 2013, 06:23:26 pm »
I have spare transmissions I may sell if the price is right. I can assemble a good bottom end for the right price as well

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Re: WTB 500 transmission
« Reply #6 on: September 20, 2013, 05:44:43 am »
It's parked and the motor is off he's just a **** and doesn't want to split his cases. I keep telling him lets just do it but he won't sack up and just wants to buy a good condition working bottom end.

LOL.  It's looking like I will just be tearing this bottom end apart. 

If they are jumping out of gear you are probably going to need to replace at least two gears and possibly a shift fork. 

DO NOT KEEP PRESSURE AGAINST THE SHIFT LEVER WITH YOUR FOOT IN ATTEMPT TO HOLD IT IN GEAR. 

Trying to hold it in gear burns the tip s of the shift forks. 

I hate to say it but you need to park it or fix it before something breaks.....then it will be real expensive.

It's been parked since it happened.  Already took the motor off the frame and the cylinder is off.

I have spare transmissions I may sell if the price is right. I can assemble a good bottom end for the right price as well

Is it taken apart?  Are all the gears and pieces there? 

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Re: WTB 500 transmission
« Reply #7 on: September 20, 2013, 09:06:44 am »
Motoman, IMHO if you have good cases with no known problems (other than second gear), you would probably be money ahead in the end if you just repair your existing engine.  Spend the money to replace worn and damaged parts, get the gears back cut and walk away with a solid bottom end.  If you just buy another one, it is a crap shoot, you might be having the same problems as soon as you fire it up.

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Re: WTB 500 transmission
« Reply #8 on: September 20, 2013, 09:09:51 am »
Please excuse my ignorance

When back cutting gears .... Does this require shifting down to first when stopped? No down shifting while moving?
87 HPR LT500
04 Roll LOBO II TRX250R
06 LTR450
87 LT500
85 & 86 LT250
86 & 87 TRX250R
07 & 09 Husqvarna TE450
00 CR125R

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Re: WTB 500 transmission
« Reply #9 on: September 20, 2013, 09:55:19 am »
No. The transmission functions normally.

They cut an angle on the dogs so when the gears engage they pull each other together rather than pushing apart. When they push apart, pressure is put on the shift fork causing it to bend or otherwise fail.

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Re: WTB 500 transmission
« Reply #10 on: September 20, 2013, 10:35:02 am »
I have bottom ends that are assembled and ones that are apart, all the pieces for transmissions are there on the disassembled ones.

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Re: WTB 500 transmission
« Reply #11 on: September 20, 2013, 11:22:05 am »
step 1: splt cases
step 2: send to WCR for backcutting 200.00
step 3: new shift forks and springs
step 4: reassemble and enjoy, its better than new.

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Re: WTB 500 transmission
« Reply #12 on: September 20, 2013, 12:05:54 pm »
My trans was back cut by WCR. It works great. Who else does that work? HPR?

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Re: WTB 500 transmission
« Reply #13 on: September 20, 2013, 12:23:10 pm »
Bob aka RxHp

He did the trans that's in your dad's bike, Nopick.  He does all of Mikes trannies.

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Re: WTB 500 transmission
« Reply #14 on: September 20, 2013, 07:27:15 pm »
That's right. I knew someone else did them for Mike but I couldn't remember the name... Mike said Bob's turn time was "highly variable" ... So we went with WCR.

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Re: WTB 500 transmission
« Reply #15 on: September 21, 2013, 09:00:18 am »
I do want to get the gears back cut.  Might as well since I have to mess with the tranny.

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Re: WTB 500 transmission
« Reply #16 on: September 21, 2013, 11:52:22 am »
I do want to get the gears back cut.  Might as well since I have to mess with the tranny.

We also back cut gears.  I do not recommend it unless you are just trying to avoid buying new gears because the dogs are rounded to the point that it jumping out of gear. 

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Re: WTB 500 transmission
« Reply #17 on: September 21, 2013, 11:56:32 am »
step 1: splt cases
step 2: send to WCR for backcutting 200.00
step 3: new shift forks and springs
step 4: reassemble and enjoy, its better than new.


In step 3:  are you referring to clutch springs or the shift drum and paw springs?

 

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